更新响应JSON以响应SWIFT中的可解码响应 [英] Update responseJSON to responseDecodable in Swift

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本文介绍了更新响应JSON以响应SWIFT中的可解码响应的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我是SWIFT新手,我正在尝试升级一些旧的SWIFT代码。我收到以下警告:

‘responseJSON(queue:dataPreprocessor:emptyResponseCodes:emptyRequestMethods:options:completionHandler:)’ 已弃用:responseJSON已弃用,将在 Alamofire 6.改用responseDecodable。

.在以下代码中:

extension Alamofire.DataRequest {
    func json(_ options: JSONSerialization.ReadingOptions = .allowFragments, successHandler: ((Any?) -> Void)? = nil, failureHandler: ((AFDataResponse<Any>) -> Void)? = nil) -> Self {
        return responseJSON() {
            response in
            if UtilityService.ensureSuccessful(response, failureHandler: { failureHandler?(response) }) {
                successHandler?(response.value)
            }
            NetworkActivityManager.sharedInstance.decrementActivityCount()
        }
    }
}

如果我将responseJSON替换为responseDecodable,则会收到此错误:

无法推断泛型参数"T"

我需要做什么才能更新此代码?

推荐答案

Alamofire推荐使用responseDecodable(),因为大家经常使用responseJSON(),然后获取response.data,对其调用JSONDecoder()。因此,这是对JSONSerialization的内在呼唤。此外,由于Codable是新的,而且仍然有旧的问题可用,所以人们可能会错过Coble功能。请参阅AlamoFire Repo上的this topic
因此,如果您使用Codable,我建议尽可能使用responseDecodable()

但是,您仍然可以通过检索Data而不进行转换来手动完成:

为此,请使用:

@discardableResult func responseData(queue: DispatchQueue = .main, dataPreprocessor: DataPreprocessor = DataResponseSerializer.defaultDataPreprocessor, emptyResponseCodes: Set<Int> = DataResponseSerializer.defaultEmptyResponseCodes, emptyRequestMethods: Set<HTTPMethod> = DataResponseSerializer.defaultEmptyRequestMethods, completionHandler: @escaping (AFDataResponse<Data>) -> Void) -> Self

使用中:

request.responseData { response in
    switch response.result {
        case .success(let data):
            do {
                let asJSON = try JSONSerialization.jsonObject(with: data)
                // Handle as previously success
            } catch {
                // Here, I like to keep a track of error if it occurs, and also print the response data if possible into String with UTF8 encoding
                // I can't imagine the number of questions on SO where the error is because the API response simply not being a JSON and we end up asking for that "print", so be sure of it
                print("Error while decoding response: "(error)" from: (String(data: data, encoding: .utf8))")
            }
        case .failure(let error):
            // Handle as previously error
        }
}

这篇关于更新响应JSON以响应SWIFT中的可解码响应的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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